Table mounting for grinding machines



May 9, 1933. c. KNOWLES 1,908,259

TABLE MOUNTING FOR GRINDING MACHINES Filed May" 29, 1931 Fig.1.

Fig. 2.

W K26 2e upn INVENTOR Carroll 1010 14/165 Patented May 9, 1933 Y UNITEDSTATES P NT OFFICE CARROLL KNOWLES} or wnsr HARTFORD, 'ooNNnc'ri'cu'r; AssIeNon To PRAT'rfiiti WHITNEY COMP NY, or HARTFORD, coNNnc'rIoU'r, A conro'RA'rIoN on NEW JE SEY TABLE MOUNTING FOR GRINDING MACHINES Application filed May 29; 1931. Serial No. 540,930;

' This invention relates to grinding machines and particularly to a table supporting means therefor. V r V V A primary object of the present invention 5 is to provide an adjustable table support or mounting enabling a. rotatable table to be adjusted about axes in planes normal to each other, so that the table may have limited adjustability in any direction.

Another object of the invention is to provide an improved pivotal mounting r'or a table supporting member permitting slight angular adjustment of the table sup-portlng member relative to its carriage or the base of the machine about one axis, and also permitting slight angular adjustment of the support about an axis normal thereto;

v And finally it is an object of the invention to provide a universal pivotal connection for a table supporting member adapted primarily'for a surface grinder, the connection permitting angular adjustment of the supporting member about the pivot on one axis, and angular adjustment of thepivotwithin '2 its bearings upon a slightly different axis.

With the above and other objects inview my invention consists in the features of construction and operation set forth in the" fol lowing specification and illustrated in the accompanying drawing.

In the accompanying drawing annexed hereto andv forming a part of this specification, I have shown my invention embodied in a surface grinding machine having a table rotatable upon a vertical axis, but it will be understood that the invention can be oth'erwise embodied and that thed-rawingflis not to be construed as defining or limiting the scope of the invention, the claims appended to this specification being relied upon for that purpose.

In the drawing:

Figure 1 is a side elevation in section of I the table supporting member and adjacent.

parts showing its adjustments and the driving connections for the rotatable table mounted within the supporting member. I

Fig. 2 is a sectional View taken upon the plane of line 22 of Fig. l, and Fig. 3 is a side elevation showing an end view of the parts shownin Fig. 2; I j In the above mentioned drawing I have shown but one embodiment of the invention which is now-deemed preferable, but it is to be understood thatohan es and modifications may be made Within t e scope of the appended claims. without departing gfrom' the spirit of the invention.

In the operation of grinding machines, particularly surface grinding machines, it is essential that some means be provided. for

adjusting the surface of thetable on which work pieces are mounted relative to the work engaging surface ofthe wheel. The present application showsthe improvement in work table supports applied to the type of grinder shown and described in the patent to Knowles 1,458,623 in which a wheel rotating upon a vertical axis engages work mounted upon a horizontal table. The table is adapted tobe rotated atsuitable speeds upon: an axis parallel to that of the Wheel. In the patent to Knowles adjustment. of the table is accomplished by oscillation of its supporting member in one plane only, this adjustment bein employed for grinding slightly concave surfaces or fiat, as the case may No means are provided in the patent to Knowles for eflecting-any adjustment in a plane nor-v mal to that of the pivot on which .thetable supporting member is mounted-n It will be understood, however, that in theeventthat the pivotfon the tablesupport isnot posi; tioned accurately the work will engage the wheel upon one side only and, to effect uniform operation and eliminate expensive-op erations to obtain the precisiom necessary, an adjustment of the table supporting member about another axis shouldbe employed. I therefore provide a pivot supported in suitable bearings within the carriage or base inone axis and engaging bearings for the table support in an axis at a slight angle thereto. The shaft forming the pivotal connection for the table supporting member has journals for the carriage or base bearings the axis of which is at a slight angle relative to the journal for the table supporting member. Rotation, therefore, of the shaft will vary the angular position of the table sup porting member in a plane normal to that of oscillating the table support upon the shaft. By rotation of the shaft to an adjusted position and by oscillation of the tablesup porting member, the Work mounting surface .of the table can be adjusted to precisely normal position relative to the axis of rotation of the wheel.

VRefer-ring more in detail to the figures of the'drawing, I providea base 10 on which may be slidably mounted a suitable carriage 11, this carriage being retained in any adjusted"'position upon suitable ways (not shown) but which may be similar to those shown in the patent to Knowles above mentioned. On this carriage 11 is pivotally mou'nted'a table supporting member 12 within which is rotatably mounted a work table 13.; Means to' rotate this table 13 are providedin the form of a'bevel gear 14 driven by an intermeshing bevel gear 15 on a suitable driving shaft 16. The bevel gear 14 is mounted on the lower end of. a vertical spindle 17 on'which the table 13 is mounted. Suitable bearings 18 are provided within the table supporting member for this spindle 17 so that the table 13 may be rotated at any desired speed. Cooperating with this table 13 is a wheel 20 mounted for adjustment upon a vertical axis, the wheel being shown by dot-and-dash lines only, as it and its means for adjustment relative to the table 13 forms no part of the present invention. It will be understood that any means may be employed for rotating the wheel and adjusting it vertically toward and from work mounted on the table. 7

In order to adjust the table supporting member 12 a transverse shaft 22 forming a plvot is mounted in rear of the carriage 11 and supporting member 12. At the front of the machine is a screw or stud 23 suitably at tached to the carriage 11 and extending through a projection 24 on the'forward portion of the table supporting member 12. By means'of nuts 25 engaging the opposite faces of thisprojection 24 and mounted on the screw 23 the angular position of the support mg member 12 and the table 13 may be varied about the axisofjthe bearing of the ta.- blesupport '12 upon the pivot 22.

The shaft 22 and its connections to the carriage 11 and table support 12 are shown most clearly in Fig. 2, in which it will be seen that the journal portions 26 on the shaft 22 which the bearings in the carriage engage are out of alinement from the axis of the journal for the bearing surface 27 wlthin the table support 12. Set screws 28 engage the shaft for effecting rotative adjustments of thisshaft 22 by a suitable wrench.

" What I claim is:

1. A table supporting means for grinding machines comprising m'combination, a carriage, a table supporting member pivotallymounted thereon, means for'retaining said supporting member in predetermined oscillated positions relative to said carriage, and means to pivotally adjust said supporting member in a plane normal to-said first ad-. justmentj r 2. A table supporting means for grinding machines comprising in combination, a-carriage, a supporting member pivotally mounted thereon, a table rotata-bly mounted withinsaid support, and means 'to pivotally adjust said supportingmember in a plane normal to the first plane of adjustment.

3. A table supporting means for grindi 'ig machines comprising in combination, a car ria-ge, a table supporting member thereon, a table rotatably mounted therein, a pivot 0on necting said carriage and supporting menu her for relative angular adjustment in one plane, the journals on saidpivot respectively for said carriage and for said' supporting member being in axes slightly out of alinement whereby rotation of said pivot will adjust the support angularly in a plane normal to the plane of oscillation of said supporting member upon said pivot.

4. A table supporting means for grinding machines comprising in combination, a car riage, a supporting member thereon, a table rotatably mounted in said supporting mem her, a pivot connecting said carriage and sup-, port whereby said supporting member may be adjusted about the axis thereof, said pivot havingbearings for said carriage in one axis and bearings for said support in an axis anmounted thereon, the pivotal connection comprising a shaft having its surfaces engaging said carriage and supporting member disposed in axes intersecting each other whereby said supporting member may be oscillated upon either axis of said surfaces.

6. A table supporting means for grinding machines comprising in combination, a carriage, a table supporting member pivotally mounted thereon, the pivotal connection com prising a shaft ha ing bearings engaging said carriage and said supporting member, the axes of said bearings being at a slight angle to each other whereby adjustment of said supporting member on said shaft or adjustment of said shaft within said carriage adjusts said supporting member about axes in planes normal to each other.

In testimony whereof, I hereto affix my signature.

CARROLL KNOWLES. 

